/*
* Helper function for write record in llog.
* It hides all transaction handling from caller.
* Valid only with local llog.
*/
int llog_write(const struct lu_env *env, struct llog_handle *loghandle,
struct llog_rec_hdr *rec, struct llog_cookie *reccookie,
int cookiecount, void *buf, int idx)
{
struct dt_device *dt;
struct thandle *th;
int rc;
LASSERT(loghandle);
LASSERT(loghandle->lgh_ctxt);
LASSERT(loghandle->lgh_obj != NULL);
dt = lu2dt_dev(loghandle->lgh_obj->do_lu.lo_dev);
th = dt_trans_create(env, dt);
if (IS_ERR(th))
return PTR_ERR(th);
rc = llog_declare_write_rec(env, loghandle, rec, idx, th);
if (rc)
GOTO(out_trans, rc);
rc = dt_trans_start_local(env, dt, th);
if (rc)
GOTO(out_trans, rc);
down_write(&loghandle->lgh_lock);
rc = llog_write_rec(env, loghandle, rec, reccookie,
cookiecount, buf, idx, th);
up_write(&loghandle->lgh_lock);
out_trans:
dt_trans_stop(env, dt, th);
return rc;
}
/*
* Helper function for write record in llog.
* It hides all transaction handling from caller.
* Valid only with local llog.
*/
int llog_write(const struct lu_env *env, struct llog_handle *loghandle,
struct llog_rec_hdr *rec, int idx)
{
struct dt_device *dt;
struct thandle *th;
int rc;
ENTRY;
LASSERT(loghandle);
LASSERT(loghandle->lgh_ctxt);
LASSERT(loghandle->lgh_obj != NULL);
dt = lu2dt_dev(loghandle->lgh_obj->do_lu.lo_dev);
th = dt_trans_create(env, dt);
if (IS_ERR(th))
RETURN(PTR_ERR(th));
rc = llog_declare_write_rec(env, loghandle, rec, idx, th);
if (rc)
GOTO(out_trans, rc);
th->th_wait_submit = 1;
rc = dt_trans_start_local(env, dt, th);
if (rc)
GOTO(out_trans, rc);
down_write(&loghandle->lgh_lock);
rc = llog_write_rec(env, loghandle, rec, NULL, idx, th);
up_write(&loghandle->lgh_lock);
out_trans:
dt_trans_stop(env, dt, th);
RETURN(rc);
}
static int llog_test_7(struct obd_device *obd)
{
struct llog_ctxt *ctxt = llog_get_context(obd, LLOG_TEST_ORIG_CTXT);
struct llog_handle *llh;
struct llog_create_rec lcr;
char name[10];
int rc;
ENTRY;
sprintf(name, "%x", llog_test_rand+2);
CWARN("7: create a log with name: %s\n", name);
LASSERT(ctxt);
rc = llog_create(ctxt, &llh, NULL, name);
if (rc) {
CERROR("7: llog_create with name %s failed: %d\n", name, rc);
GOTO(ctxt_release, rc);
}
llog_init_handle(llh, LLOG_F_IS_PLAIN, &uuid);
lcr.lcr_hdr.lrh_len = lcr.lcr_tail.lrt_len = sizeof(lcr);
lcr.lcr_hdr.lrh_type = OST_SZ_REC;
rc = llog_write_rec(llh, &lcr.lcr_hdr, NULL, 0, NULL, -1);
if (rc) {
CERROR("7: write one log record failed: %d\n", rc);
GOTO(ctxt_release, rc);
}
rc = llog_destroy(llh);
if (rc)
CERROR("7: llog_destroy failed: %d\n", rc);
else
llog_free_handle(llh);
ctxt_release:
llog_ctxt_put(ctxt);
RETURN(rc);
}
/* returns negative on error; 0 if success; 1 if success & log destroyed */
int llog_cancel_rec(const struct lu_env *env, struct llog_handle *loghandle,
int index)
{
struct llog_thread_info *lgi = llog_info(env);
struct dt_device *dt;
struct llog_log_hdr *llh = loghandle->lgh_hdr;
struct thandle *th;
int rc;
int rc1;
bool subtract_count = false;
ENTRY;
CDEBUG(D_RPCTRACE, "Canceling %d in log "DOSTID"\n", index,
POSTID(&loghandle->lgh_id.lgl_oi));
if (index == 0) {
CERROR("Can't cancel index 0 which is header\n");
RETURN(-EINVAL);
}
LASSERT(loghandle != NULL);
LASSERT(loghandle->lgh_ctxt != NULL);
LASSERT(loghandle->lgh_obj != NULL);
dt = lu2dt_dev(loghandle->lgh_obj->do_lu.lo_dev);
th = dt_trans_create(env, dt);
if (IS_ERR(th))
RETURN(PTR_ERR(th));
rc = llog_declare_write_rec(env, loghandle, &llh->llh_hdr, index, th);
if (rc < 0)
GOTO(out_trans, rc);
if ((llh->llh_flags & LLOG_F_ZAP_WHEN_EMPTY))
rc = llog_declare_destroy(env, loghandle, th);
th->th_wait_submit = 1;
rc = dt_trans_start_local(env, dt, th);
if (rc < 0)
GOTO(out_trans, rc);
down_write(&loghandle->lgh_lock);
/* clear bitmap */
mutex_lock(&loghandle->lgh_hdr_mutex);
if (!ext2_clear_bit(index, LLOG_HDR_BITMAP(llh))) {
CDEBUG(D_RPCTRACE, "Catalog index %u already clear?\n", index);
GOTO(out_unlock, rc);
}
loghandle->lgh_hdr->llh_count--;
subtract_count = true;
/* Pass this index to llog_osd_write_rec(), which will use the index
* to only update the necesary bitmap. */
lgi->lgi_cookie.lgc_index = index;
/* update header */
rc = llog_write_rec(env, loghandle, &llh->llh_hdr, &lgi->lgi_cookie,
LLOG_HEADER_IDX, th);
if (rc != 0)
GOTO(out_unlock, rc);
if ((llh->llh_flags & LLOG_F_ZAP_WHEN_EMPTY) &&
(llh->llh_count == 1) &&
((loghandle->lgh_last_idx == LLOG_HDR_BITMAP_SIZE(llh) - 1) ||
(loghandle->u.phd.phd_cat_handle != NULL &&
loghandle->u.phd.phd_cat_handle->u.chd.chd_current_log !=
loghandle))) {
/* never try to destroy it again */
llh->llh_flags &= ~LLOG_F_ZAP_WHEN_EMPTY;
rc = llog_trans_destroy(env, loghandle, th);
if (rc < 0) {
/* Sigh, can not destroy the final plain llog, but
* the bitmap has been clearly, so the record can not
* be accessed anymore, let's return 0 for now, and
* the orphan will be handled by LFSCK. */
CERROR("%s: can't destroy empty llog #"DOSTID
"#%08x: rc = %d\n",
loghandle->lgh_ctxt->loc_obd->obd_name,
POSTID(&loghandle->lgh_id.lgl_oi),
loghandle->lgh_id.lgl_ogen, rc);
GOTO(out_unlock, rc);
}
rc = LLOG_DEL_PLAIN;
}
out_unlock:
mutex_unlock(&loghandle->lgh_hdr_mutex);
up_write(&loghandle->lgh_lock);
out_trans:
rc1 = dt_trans_stop(env, dt, th);
if (rc == 0)
rc = rc1;
if (rc < 0 && subtract_count) {
mutex_lock(&loghandle->lgh_hdr_mutex);
loghandle->lgh_hdr->llh_count++;
ext2_set_bit(index, LLOG_HDR_BITMAP(llh));
mutex_unlock(&loghandle->lgh_hdr_mutex);
}
RETURN(rc);
}
/* Test record writing, single and in bulk */
static int llog_test_3(struct obd_device *obd, struct llog_handle *llh)
{
struct llog_create_rec lcr;
int rc, i;
int num_recs = 1; /* 1 for the header */
ENTRY;
lcr.lcr_hdr.lrh_len = lcr.lcr_tail.lrt_len = sizeof(lcr);
lcr.lcr_hdr.lrh_type = OST_SZ_REC;
CWARN("3a: write one create_rec\n");
rc = llog_write_rec(llh, &lcr.lcr_hdr, NULL, 0, NULL, -1);
num_recs++;
if (rc) {
CERROR("3a: write one log record failed: %d\n", rc);
RETURN(rc);
}
if ((rc = verify_handle("3a", llh, num_recs)))
RETURN(rc);
CWARN("3b: write 10 cfg log records with 8 bytes bufs\n");
for (i = 0; i < 10; i++) {
struct llog_rec_hdr hdr;
char buf[8];
hdr.lrh_len = 8;
hdr.lrh_type = OBD_CFG_REC;
memset(buf, 0, sizeof buf);
rc = llog_write_rec(llh, &hdr, NULL, 0, buf, -1);
if (rc) {
CERROR("3b: write 10 records failed at #%d: %d\n",
i + 1, rc);
RETURN(rc);
}
num_recs++;
if ((rc = verify_handle("3c", llh, num_recs)))
RETURN(rc);
}
if ((rc = verify_handle("3b", llh, num_recs)))
RETURN(rc);
CWARN("3c: write 1000 more log records\n");
for (i = 0; i < 1000; i++) {
rc = llog_write_rec(llh, &lcr.lcr_hdr, NULL, 0, NULL, -1);
if (rc) {
CERROR("3c: write 1000 records failed at #%d: %d\n",
i + 1, rc);
RETURN(rc);
}
num_recs++;
if ((rc = verify_handle("3b", llh, num_recs)))
RETURN(rc);
}
if ((rc = verify_handle("3c", llh, num_recs)))
RETURN(rc);
CWARN("3d: write log more than BITMAP_SIZE, return -ENOSPC\n");
for (i = 0; i < LLOG_BITMAP_SIZE(llh->lgh_hdr) + 1; i++) {
struct llog_rec_hdr hdr;
char buf_even[24];
char buf_odd[32];
memset(buf_odd, 0, sizeof buf_odd);
memset(buf_even, 0, sizeof buf_even);
if ((i % 2) == 0) {
hdr.lrh_len = 24;
hdr.lrh_type = OBD_CFG_REC;
rc = llog_write_rec(llh, &hdr, NULL, 0, buf_even, -1);
} else {
hdr.lrh_len = 32;
hdr.lrh_type = OBD_CFG_REC;
rc = llog_write_rec(llh, &hdr, NULL, 0, buf_odd, -1);
}
if (rc) {
if (rc == -ENOSPC) {
break;
} else {
CERROR("3c: write recs failed at #%d: %d\n",
i + 1, rc);
RETURN(rc);
}
}
num_recs++;
}
if (rc != -ENOSPC) {
CWARN("3d: write record more than BITMAP size!\n");
RETURN(-EINVAL);
}
if ((rc = verify_handle("3d", llh, num_recs)))
RETURN(rc);
RETURN(rc);
}
